4-phosphorinanone-1-sulfides



United States Patent The present invention relates to organosphosphorus compounds and methods for preparing same. More particularly, the instant discovery relates to 4-phosphorinanone derivatives of the formulae:

(A) 0 ii Pi -CE HC-R NOH &

R in the above formulae represents a member selected from the group consisting of substituted and unsubstituted,

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branched and straight chain alkyl (C -C substituted and unsubstituted cycloalkyl, substituted and unsubstituted aryl; R R R and R each represent a member selected from the group consisting of hydrogen, lower alkyl, phenyl, chloro-substituted phenyl, lower alkyl-substituted phenyl, cyclohexyl and lower alkoxyalkyl; R and R each represent a member selected from the group consisting of hydrogen, lower alkyl and phenyl; and R represents alkyl having from 1 to 12 carbon atoms.

The 4-phosphorinanone reactants are prepared according to copending US. application, Serial No. 161,405, filed simultaneously herewith on December 212, 1961, now abandoned, by reacting a primary phosphine RPH with a divinyl ketone (l,4-dien-3-one) of the formula R R and recovering the corresponding phosphorinanone.

The primary phosphine reactant and the 1,4-dien-3-one reactant are best reacted at a temperature in the range of C. to 200 C. and recovering the resulting 4-phosphorinanone product by volatilization, for example, at a reduced pressure in the range of O to 760 millimeters, Reaction is best carried out in a substantially inert atmosphere, such as in a nitrogen or helium atmosphere, or the like. No catalyst or solvent is necessary for the process contemplated herein.

Furthermore, the process is generally carried out at atmospheric pressure. Superatomspheric pressures as high as 700 pounds per square inch may likewise be used, particularly with low boiling reactants. Usually, however, very good results are achieved at atmospheric pressure.

Similarly, stoichiometric quantities of the reactants are generally employed. Nevertheless, small excesses of either reactant may be present Without detrimentally affecting the nature of the reaction.

Generally, the reactants are heated for at least one hour, but this is not critical since incipient reaction occurs upon intermingling the reactants.

Typical primary phosphines useful for producing 4- phosphorinanone reactants within the purview of the instant discovery are phenylphosphine, cyclohexylphosphine, dodecylphosphine, isopropylphosphine, benzylphosphine, 2-ethoxyethylphosphine, 2 cyanoethylphosphine, parachlorophenylphosphine, methylphosphine, isobutylphosphine, ethylphosphine, propylphosphine, butylphosphine, pentylphosphine, hexylphosphine, octylphosphine, heptylphosphine, decylphosphine, undecylphosphine, heptadecylphosphine, octadecylphosphine, etc.

It follows from the above listing that typical substituents for primary alkyl phosphine are lower alkoxy, phenyl, cyano and the like. Typical substituents for primary aryl phosphine, such as phenyl phosphine, are halogen (e.g. Cl, Br, and I) lower alkyl, etc.

In other words, substituents which do not interfere with, enter into, i.e., are inert under the conditions of, the reaction for preparing 4-phosphorinanones are COI1tlTlr plated herein.

Among the divinyl ketones useful for preparing the 4- phosphorinanone reactants of the present invention are:

1,4-hexadien-3-one 1,4-heptadien-3 -one 1,4-octadien-3-one 7-rnethyl-l,4-octadien-3-one S-methyll ,4-hexadien-3-one S-methyl-1,4-heptadien-3-one 5 -methyl-1,4-octadien-3-one 5-ethyl-1,4-heptadien-3 -one 5-propyl-1,4-octadien-3-one 1-cyclohexylidene-3 -buten-2-one EXAMPLE 2 1-ethyl-1-methyl-4-0x0plzosphorinanium iodide A mixture of 0.4 gram of 1ethyl-4-phosphorinanone and 4 grams of methyl iodide in milliliters of ether 5 none reactants as indicated in the following table.

6 trimethyl-1-phenyl-4-phosphorinanone crystals filtered off.

Examples 1, 2, 3, 4, 5 and 6 are repeated in every essential respect substituting the respective 4-phosphorinaoxime product TABLE II Tempera- Reaction Example Reactant 4-Phosphorinanone Other Reactant ture, C. according to Product No. example 7 l-cyclohexyI-Zethylt-phosphorina- Excess heptyl bromide 50 2 l-cyclohexyl-Lheptyl-2-ethyl-4- none. phosphorinanium bromide. 8 l-dodecyl-2,2dipropyl-4-phosphor- Excess benzyl chloride... 80 2 l-benzyl-l-dodecyl-2,2-dipropyl-4- inanone. phosphorinanium chloride. 0 2-buty1 2(2-methoxyethyl)-1 octyl-4- Dodecyl iodide 2 2-buty1-1-dodecyl-2(2-methoxyphosphorinanone. etlliyll)-1-octyl-4-phos phorinanium 1o 1 e. 10 2,2,6,6-t;etraethyl-3,5-dimethy1-1- Propyl bromide 24 2 2,2,6,6-tetracthyl-3,fi-dlmethylphenyl-i-phosphorinanone. plrliipy-i-phenyl-4-phosphorinanium c on e. l-propy12,fi-diisopropylphenyl-i- Sulfur 50 1 1-propyl-2,fi-diisopropylphenyliphosphorinanone. phosphorinanone-l-sultide. 1-(2 ethoxyethyl)-2,2,6,6-tetraethyl-4- 110 1 1-(2-ethoxyethyl)-2,2,6,6-tetraethylphosphorinanone. 4-phosphorinanone-l-sulfide. 2,2-diethyl1-octadecylA-phosphor- Phenylhydrazine 60 4 2,2-diethyl-Loctadecyl--phosp horinanone. inanone, phenylhydrazone. 2-isobutyll-1nethyl4-phosphor- Para-nitrophenylhydra- 78 5 2-isobutyl-1-methyl-4-phosph0rinainanone. zine. I none, para-nitrophenylhydrazone. l-phenyl-3,5-dipr0pyl-4-ph0sphorsemlcarbazlde I-I Gland 70 3 1-phenyl-3,5-dipropyl-4-phosphorinanone. anhydrous potassium inanone, semicarbazone.

carbonate. 2-methyl-1,2-dipheny1-4-phosphor- Hydroxylamine hydro- 90 6 2-methy1-1,2-diphenyl-4-phosphorinanone. chloride and base. inanone, oxime.

under a nitrogen atmosphere gives a white precipitate on standing. The compound l-ethyl-l-methyl-4-oxophos phorinanium iodide results. After recrystallization from acetane (1 gram/ 130 milliliters) its melting point is 213 EXAMPLE 3 1,2,6-triphenyl-4-phosphorinanone, semicarbazone A mixture of 0.4 gram semicarbazide hydrochloride and anhydrous potassium carbonate is added to a slurry of 0.9 gram of 1,2,6-triphenyl-4-phosphorinanone in 10 milliliters of 2B alcohol and 1 milliliter of water, the re sulting mixture warmed for 10 minutes, cooled and diluted with water. The yield of 1,2,6-triphenyl-4-phosphorinanone, semicarbazone, product is 100% after recrystallization from 2B ethanol.

EXAMPLE 4 1-heptadecyl-2,2,6,6-tetramethyl-4-phosphorinanone, phenylhydrazone EXAMPLE 5 2-metl1yl-1-phanyl-4ph0sph0rinan0ne, para-nitrophenylhydrazone Example 4 is repeated in every essential respect substituting the ketone and hydrazine reactant with Z-methyl- 1-phenyl-4-phosphorinanone and para-nitrophenylhydrazine, respectively.

EXAMPLE 6 2,2,6-trimethyl-1-phenyl-4-phosph0rinan0ne, oxime One part hydroxylamine hydrochloride is dissolved in 6 parts of H 0. To this is added 4 parts of 10% NaOH solution and 0.4 part 2,2,6-trimethyl-1-phenyl4-phosphorinanone. The resulting mixture is warmed for 10 minutes on a steam bath, cooled and the resulting 2,2,6-

The sulfide derivatives of the present invention are best produced by reacting stoichiometric amounts of sulfur and the 4-phosphorinanone reactant at temperatures in the range of 50 C. to 150 C. and in the presence of an inert organic solvent. Usually the reaction is carried out at a temperature below the boiling point of the solvent. Typical solvents are aromatic hydrocarbons, e.g., benzene, toluene, xylene, and the like. The resulting product is recovered by recrystallization. The 4-oxopl1osphorinanium halides are generally produced by reacting stoichiometric amounts of an alkyl halide and a 4-phosphorinanone in a nitrogen atmosphere and in the presence of an ether solvent, or excess alkyl halide, at a temperature in the range of 0 C. to C., preferably temperatures below the boiling point of the ether solvent When used.

The semicarbazone derivatives of the present invention are usually carried out by reacting semicarbazide hydrochloride with a weak inorganic or organic base, such as potassium carbonate, sodium acetate, and the like, in the presence of a lower alkanol and at a temperature in the range of 40 C. to C.

As to the phenylhydrazone derivatives of the instant discovery, the production thereof is generally accomplished by reacting a phenylhydrazine with a 4-phosphorinanone under nitrogen and in the presence of a lower alkanol. Temperatures in the range of 50 C. to 100 C. are generally employed.

The para-nitro-phenylhydrazone derivatives are produced in the same manner as the phenylhydrazone derivatives, save that para-nitro-phenylhydrazine is used in lieu of phenylhydrazine.

The oxime derivatives of the present invention are prepared as in Example 4, above, using hydroxylamine hydrochloride and an equivalent amount, basis the hydroxylamine hydrochloride, of alkali metal hydroxide. The solvent used is Water and temperatures in the range of 50 C. to 100 C. are employed.

The 4-phosphorinanone derivatives of the present invention have direct utility as gasoline additives. For example, up to about 10 milliliters of any one of these derivatives, when dissolved in one gallon of gasoline, affords protection against misfiring, surface ignition, and the like.

Clearly, the instant discovery encompasses numerous modifications Within the skill of the art. Consequently,

wherein R is a member selected from the group consisting of substituted and unsubstituted, branched and straight chain alkyl having from 1 to 18 carbon atoms, cycloalkyl, substituted and unsubstituted aryl; said substituents for alkyl being selected from the group consisting of lower alkoxy, phenyl and cyano, and said substituents for aryl being selected from the group consisting of halogen and lower alkyl; R R R and R each represent a member selected from the group consisting of hydrogen, lower alkyl, phenyl, chloro-substituted phenyl, lower alkyl-substituted phenyl, cyclohexyl and lower alkoxyalkyl; and R and R each represent a member selected from the group consisting of hydrogen, lower alkyl and phenyl.

2. 2,2,6,6 tetramethyl l-phenyl 4 phosphorinanone-l-sulfide.

References Cited by the Examiner UNITED STATES PATENTS 2,855,435 10/1958 Grillot et a1. 260554 2,875,249 2/1959 Stansbury et a1. 260586 2,898,375 8/1959 Guex et al. 260586 2,903,482 9/1959 Hoptf et a1. 260566 2,959,615 11/1960 Lum et al. 260554 2,975,213 3/1961 Layer 260566 TOBIAS E. LEVOW, Primary Examiner.

IRVING MARCUS, Examiner.

H. R. JILES, F. R. OWENS, Assistant Examiners. 

1. A 4-PHOSPHORINANONE-1-SULFIDE OF THE FORMULA 